Broaching machine for shift rods



Juliy E6 193% W. A. HART 2,008,208

BROACHING MACHINE FOR SHIFT RODS Filed July 16, 1951 5,S heets-Sheet 1 67 67 E- E. INVENTOR 'n zzzwm f7. Hart.

ATTORNEYS- July 16, 1935. w HART 2,008,208

BROACHING MACHINE FOR SHIFT RODS- Filed July 16, 1931 5 Sheets-Sheet 2 INVENTOR 7 William 5. Hart.

6 M ms ATTORNEYS.

July 16, 1935. I w. A. HART BROACHING MACHINE FOR SHIFT RODS Filed July 16, 1931 3 Sheets-Sheet 5 jZi /7 KIZIII: 434

INVENTOR William (7. Hard:

ATTORNEY Patented July 16, 1935 UNITED STATES PATENT OFFICE 2,008,208 7 BROACHING MACHINE FOR smrr eons William A. Hart, Detroit, Mich, vassignor to Colonial Broach Company, a corporation of Michigan Application as 16, 1931, Serial No. 551,089

Claims. (01. ice-3s) ated in opposite directions controlled by the movement of a single control handle; to'provide each work piece receiving head with a chamber having a plurality of spaced jaws between which work pieces may be disposed and clamped when the jaws and work pieces are moved into scontiguous relation to each other; to provide positioning means on one of said heads for locating the notched work pieces circumferentially in the spaces in the chamber; to provide an actuating member for the jaws which progressively move them from clamped position to release all of the work pieces therebetween which drop from the chamber when the support therefor has been moved from across the bottom of the clamping head; and to provide a single control handlefor positioning the jaw members of both heads, by actuating the jaw members into clamped position in one head during the time the jaw members are moved to unclamped position in the other head. I

Other objects and features of novelty of my invention will be either specifically pointed out or will become apparent when referring, for a better understanding of my invention, to the following description in conjunction with the accompanying drawings, wherein: Figure 1 is a plan view of a breaching machin which embodies features of my invention,

Fig. 2 is an enlarged plan View of one of the work piece clamping heads-illustrated in Fig. -1,

Fig. 3 is a sectional view of the structure illustrated in Fig. 2, taken-on the line 3 3 thereof,

Fig. 4 is a sectional view-of the structure illustrated in Fig. 2, taken on the line l-i thereof,

Fig. 5 is an enlarged View of" the head illustrated in Fig. 1 which is positioned adjacent to the head illustrated in Fig. 2, I

Fig. 6 is a sectional View of the structure illustrated in Fig. 5, taken on the line E6 thereof,

Fig. '7 is a sectional view of the structure illustrated in Fig. 5, taken on the line 7-4 thereof,

Fig. 8 is an enlarged sectional view of the structure illustrated in Fig. 7 taken on the line 88 thereof,

Fig. 9 is an enlarged plan view of the combined ters 23 and 2%.

to the outlet port 3|.

work piece clamping heads illustrated inFigs. J2

and5,

Fig. 10 is a plan view of a work piece as ma-' 'chinedby the broaching cutters in the work piece.

supporting heads illustrated in Fig. 9, and

Fig. 11 is an elevational view of the structure illustrated in Fig. 10.

My invention comprises in general a. broaching machine ldwhich cuts related notches in the ends and sides of rods which are longitudinally and circumferentially spaced thereon. The rods herein shown and described, are provided in the 7 nature of shift rods employed in automotivevehic'le transmissions'for controlling the position and manipulation of the shift lever of the-ve- It; is, however, to'be understood that my hicle. machine is not limited to this particularap'plication but may be employed to cut notches on' other types of workpieces. The machinexis provided with a suitable cradle lfi'having a face plate ll mounted on the front end thereof and a pair of hydraulic rams l8 and I9 mountedlon the rear portion, as illustrated in Fig. 1. Reciprocable pistons 2! are provided in thezrams i8 and IS, the front ends of the rods thereof being pivotally connected at 22 to broaohing cut- Work piece supporting heads and 26 are mounted on the front surface of the face plate 57 in a position to have the broachcutters, 23 andZdpass therethrough when the pistons 21 are reciprocated, for machining work pieces which are clamped within thesupporting heads.

Referring to the cylinders I8 and [9, an inlet fluid supply line-28 is connected to one side of a valve 29 which has an outlet conductor 3| attached thereto on the opposite side of the valve from that'to which the inlet conductor 28 isatit, as shown in the figure, and also to the rear end of the adjacent ram l9. When the handle as is moved to its opposite position the conductor of the cylinder i9 and the conductor 33 of the cylinder l8 are connected to the inletport and the'conductor 32 of the cylinder I 8 and the conductor 33 of the cylinder I9 is connected In this manner the actuation of the handle 34 controls the movement of the pistons and therefore the breaching cutters 23 and 24 which, in the arrangement of the valve ,onaone side of the adjacent head 25.

as illustrated and described, reciprocates the cutters in opposite directions, for a reason which will be explained hereinafter.

Referring to Figs; 2, 3 and 4, I have illustrated the work piece supporting head 26 as comprising a body portion 35 having a centering flange 30 thereon which accurately positions the head on the face plate !'I when the end 35 is bolted thereon in a well known manner. Integral with the supporting end Stare the frontwardly extending sides El and which are joined at their end by a portion Thebody portion thus formed is preferably a casting but it is to be understood that the body portion may be fabricated from a plurality of i. embers or constructed in any other manner known in the art. A plurality of bolts 52 extend through the side 3'. and support a side member 43, as illustrated more clearly in Figs. 2 and 3, and bolts 4Q extend through the side member 38 for supporting the side portion 15 of the head. w

The side portions '53 and E5 form a chamber in which a plurality'ofclarnping jaws 56 are disposed to Ice-movable longitudinally between the side members 43 and d5. Slots 4? are provided in the central body portion of the side portions Q3 and it? for receiving a U-shaped meme ber 58, both sides of which are provided with slots 49 and with extending arms 5i having inwardly projecting tenons 532 which extend between the clamping jaws J5 and are spaced 7 therefrom a distance which progressively increases .toward the rearmost jaw.

A shaft 54 is supported in bearings 55 and 5t,

. which are provided in the sides 3? and 38 of the body portion 35, and'in a bearings? supported A handle 58 is mounted on one end of the shaft 5d and .a gear 59 is .inounted on the other end of the shaft,'b etween the bearings 56 and 5?. A cam BI is mounted on the shaf Ed medially between the bearings 55 and 53 in alignment with the clamping jaws at and the base portion of the U-shaped member 48. The cam is of the double action type having asurface G2 which engages the frontmost of the clamping jaws 4t when the 'cam'is rotated in a clockwise direction to move all of the jaws rearwardlyinto clamping relation with work pieces 63 positioned in the spaces therebetween. A second carnming surface 5:3 is provided opposite to the camming surface 62 which is efiective whenthe earn 6! is rotated in a counter-clockwise direction for engaging the base portion of the .U-shaped member dSfor moving the members frontwardly as the tenons 52 thereon engage the rear surfaces of the clampin'gjaws ina progressive manner.

:That is to say when thecam til is rotated in a counter-clockwise direction the carnming surfaced? moves away from the jaws 46 and the cam 54 moves into contact with the base portion of the U-shaped member 48 for moving the member frontwardly. As the member 43 is so moved, the first pair of tenons 52 engages the frontmost jaw 46 and after moving it a predetermined amount the next adjacent pair of tenons 52 engage the next adjacent jaw and as both of the fjaws are being moved the next succeeding jaw is picked up and moved therewith by the next, adjacent pair of tenons 52 and continuing in like manner until all of the jaws have been moved and substantially equally spaced.

' This relative movement of the plurality of jaws 46 spaces the jaws and completely unclanips all the work pieces 63 mounted therebetwe'enf The clockwise rotation of the cam SI moves the cam-- ming surface 54 out of contact with the base portion of the U-shaped member Q8 and moves the camming portion 52 into engagement with the frontmost jaw 4-5 for moving all of the jaws rear-- wardly until all of the work pieces 53 are clamped therebetween.

A slidable plate 5'6 is supported by the extending portions or. provided on the side members 43 and 45, as illustrated in Fig. 3; upon the upper surface 7 of which the jaws 46 are supported. Knife-edge trated in Fig. 1. In this manner, the'plate 5G is V adjusted relative to theposition of the. breaching cutters 23 and 24 to have the supports 58 or the apertures 55 positioned opposite to the space be tween the clamping jaws 46 for either retaining or ejecting, respectively, the work pieces 63 in or from the clamping head. I

A broaching cutter "E5 is guided between the top surface of the side member 43 and the bottom extending surface of'a plate 36,.asillustrated in Fig. 3, the plate 18 being retained thereon by bolts H. I have provided a pair of sloping plates 78 and it for regulating the lateral position of the broaching cutter 'ifi as the plates and 79 are adjusted laterally relative to each other. plate i8 is provided with recesses for receiving the heads of bolts ;8! on which nuts 82 are threaded for clamping the two members T8 and into adjusted position. The member 2'9 is proscrew 86 is threaded into or out of the side 3'! of the body portion 35. In this manner the lateral position of the breaching cutter T5 is'acljusted for cutting a notch 8'! of predetermined depth an end of the Work pieces 63 during a single passage. of'the broaching cutter 23 thereacross.

When the breaching cutter 23 reaches the end of its stroke, thepin 12 on the rod His engaged by the arm 14 of the ram, to move the plate 56 rearwardly to have the apertures 69 thereof positioned opposite to the ends of the work pieces. When the handle 58 is operated in a counterclockwise direction the jaws 4'5 are released moved frontwardly as the cammingsurracc engages the base of the U-shaped member 48, to

The i release-all of the workpieces and permit them to a drop from the openings E9 in the plate.

The work pieces 63 have a notch 8! machined in their ends by the above described operation and are transferred to the work piece receiving head 25; ilustrated in Fig; l. and shown in section and enlarged in Figs. 5:to 8 inclusive. The head 25 is similar to the head 25, being provided with frontwardly extending sides 88. and 89 ha "ng guiding members ill and 92 which are supported thereon by bolts 33.. The members GS and $3 supportand'guide the plurality of jaws d3, provided in the head25, which are moved in a similar manner as above described in relation to head 26, by a double cam 9 which is mounted the end of a shaft 95.

" The shaft is journaled in a bearing 95 in the side 65 ofthe head 25 and in a bearing 91 in the side .38 of the head 26. A gear .99 is mounted on the shaft .55 and is in mesh with the gear 59 .on

the shaft which interconnects. theshafts and secures the actuation of both cams in an oppo Site direction when the handle 58 is rotated. When the handle 58 and cam 6| are revolved in a clockwise direction the jaws 46 in the head 25 are moved into clamping position and the shaft and the cam 94 are rotated in a counter-clockwise direction for releasing the jaws 45 of t head 25.

i A jaw spacing member Iill, similar to the U-shaped spacing member 48, being substantially one-.halfthereof, is mounted in a .slot in the side of the guiding member SI for progressively moving all of the jaws 83 when actuated during the counter-clockwise movement of the cam 94, for spacing all of the jaws a predetermined distance from each other. The spacing member it is positioned on one side of the jaws only to leave the other sid free for the passage of the broaching cutter 24 which machines a plurality of notches 253 in the side of the work piece 63 relative to the notch 81 in the end thereof. The breaching cutter 24 has a recessed body portion I62 in which a plurality of cutters ice are supported in predetermined relation to each other relative to the notches 103 to be cut in the side of the work pieces. Different sets of cutting blades H34 are provided for machining slots I 5-3 which are spaced different distances from each other from that illustrated in Fig. 6.

The notches on the shift rod employed in rela tion to the first and reverse speeds are positionez relative to each other a different distance from the notchesprov-ided on the shift rods employed in relation to the second and thirdspeeds. It is, therefore, necessary to provide two different sets of breaching cutters i534 which are readily interchangeable to cut notches 33 in the rods 63 to be used in relation to either the first and reverse speed or the second and third speed. It is to be understood that the cutters H3 1, may be inter changed in the housing l 82 or preferably a separate housing may be provided with the cutters therein and the housings substituted through the manipulation of the pin 22 which connects one end of the housingto the piston rod of the ram.

For adjusting the lateral position of the breaching cutter 24*. I have provided a longitudinally adjustable plate [it]? having slots therein in which the heads I98 of bolts I09 r'egisterto permit the frontwardly and the rearwardly move ment of the plate. The plate is provided with a sloping surface which registers with the sloping surface on the guiding member 92 in the end of which a screw I i i is threaded and provided with a head H2 which'registers in a notch H3 in the end of the plate i531; When the screw III is threaded into or out of the member 92, the plate H3 adjusted frontwardly or rearwardly of the head 2 for adjusting the lateral positionof the breaching cutter 24 to regulate the depth of the notches its machined in the sides of the work pieces or rods 63. e

A supporting plate 65, similar to that employed with the head 25, is provided in the head 25 for engaging the bottom of the jaws 46 and for supporting the work pieces on the knife-edges 63 between which apertures 63 are provided. The work pieces are ejected through the apertures when the plate is moved rearwardly relative to the head, through the engagement of the arm thereof:

i the :ram with the pinTZ, projecting. from the rod H, which is attached to, the plate.

To have the notches, I03 aligned circumferentially relative to the notch 81 in the end of the rods 63, I have provided an adjusting plate H5 1 which is supported on the top of the head 25 by bolts US. A recess H1 is provided centrally of the plate having projecting portions M8, the sloping surfaces of which engage the notches 5'? in the end of the rods 5'3 which are rotated to have the edges of the notches retained in contiguous relation thereto'when the jaws 93 are moved to clamp the rods in firm fixed position. Between the sloping surfaces H3, notches iii! are provided through which the work pieces are insertedto within the space between the'clainping jaws 56,.which are moved rearwardly with the jaws when actuated by the clockwise move ment of the camming surface 62 of the cam 9% resulting in the circumferential adjustment of the rods as they move rearwardly relative to the sloping surfaces H8. The movement of thejaws 6, and the work pieces 53 is greater in the head 2'? than in the head for the purpose of effecting a sufiicient lateral movement to all of the rods 53 too'b n their circumferential adjustment. Forth-ls reason an extra tenon as: is provided on the end of the adjusting member It! which moves the rearmost jaw 45 along with the clamping jaws to effect a lateral movement to the rod 63 which is positioned in the space between the rearmos't jaws. For a similar reason the cam 94 has the surfaces 82 and'iii somewhat accentuated, over the curvature of the surfaces of the cam, to provide this greater movement frontwardly and rearwardly to the-jaws lii.

Referring to Figs. 1 and 9, the operation of my broaching. machine will now be described. When the rams 18 and 19 have been actuated by the fluid controlled through the valve 29, to have the piston 21 thereof. moved forwardly in the ram I8 and rearwardly in the ram is, as illustrated in Fig. 2, the machining operation on the head 2.5 has been completed while the broaching cutter 24 relative to the head 25 has nee reciprocated into a position to effect a cutting operation. The rods-provided with the notches to release the work pieces in the head 26 and to clamp "the work pieces in the head 25 in the manner referred to hereinabcve effected by the opposite rotation of the'shaft 5t and the shaft .95 through the engagementof the gears 59 and 99 thereof. The handle 3% of the valve 29 is then turned to reverse the flow of fluid and the movement of the piston 22 of the ram E9 to recip- \ocate thecutter 23 into forward position while the piston 2! of the ram i3 is moved rearwardly to draw the breaching cutter 24 acrossthe work pieces to 1 machine the At the end of the forward s ."cke of the ram IS the spaces between the jaws 6.4 of the head 26 are closed by the supports 68 of the plate 65 and'the spaces between the jaws 45 of the head 25 are open because of the rearward movement of the plate 66 thereof effected by the engagement of the arm M with the extending pin 72.

A plurality of rods 63 are positioned in the spaces notches 23 in the side between the clamping jaws (66 on the head 26 and the handle 58 is revolved in a clockwise'direction to move the jaws into clamping relation with thework pieces 63.

This movement eifects the counter-clockwise rotation of the shaft 95 which releases the jaws 46 of the head 25 and permits the rods 63 having notched ends to drop therefrom. The handle 34 is reversed and the cutters 23 and 24 are returned to the position illustrated in Fig. l by the movement of the piston into the positions shown in the figure. During this movement the broaching cutter 23 is drawn across the ends of the Work pieces 63 in the head 26 for machining the notches 81 therein.

In Figs. 10 and 11, I have illustrated afinished rod 63 wherein notches Bland me are provided in the top edge and the side body portion, respectively, of the rod. The notches 8'! and 183 are slightly offset angularly relative to each other effected by the slope of the surface H8 of the adjusting plate H5. It is to be understoodthat the angular relation may be increased or decreased by changing the slope of" the surfaces H3. It is to be further understood that "the spacing of the notches I523 onthe rods may be changed through the employment of a broaching cutter in which the cutting blades i534 are 10051- tioned in a different manner in the housing :52 from that illustrated in Fig. 6, which change is readily effected through the adjustment of the pin 22 which connects the breach to the ram.

By having the supporting member 6 3 of the plate 66 constructed in the form of a knife edge, assurance may be had that the rods 53 are properly adjusted in length, as it is practically impos- 'sible for shavings or other foreign matter to rest upon the edge of the support which might otherwise occur if the support was a fiat surface.

While I have described and illustrated but a .single embodiment of my invention, it will be apparent to those skilled in the art that various edge, and means for selectively positioning the knife edge rest to close and open the bottom of the chamber in accordance to the position of the broaching cutter.

2. A machine for broaching notches in the side of a rod relative to a notch in the end thereof including, in combination, a chamber for receivin and clamping the rod, means for engaging the notch and rotating said rod during the clamp,-

ing operation into a predeterminedcircumferential position, and a broaching cutter for machining a notch in said rod after it has been positioned and clamped, a support for the end of said rod,

and means actuated during the movement'ofthe breach for shifting said support to close and open the bottom of said 'chambeu 3. A machine for broachingnotches in the side of a rod relative to a notch in the end thereof including, in combination, a chamber :for receiving and clamping the rod, positioning means for rotating said rod during the clamping operation, a broaching cutter for machining a notch in theside of said rod, an adjustable rest forpositioning an end of the rod, and means for selectively positioning the rest to close and open one end of said chamber. I

4. A machine for broaching notches in the side of a rod relative to a notch in the end thereof including, in combination, achamber for receiving and clamping the rod, positioning means for rotating said rod during the clamping operation, a broaching cutter for machining a notch in the sideof said rod, an adjustable rest for positioning an end of said rod, a drawbar for selectively positioning the rest to ciose and open one end of said chamber, and means for actuating said drawbar in accordance to the position of said broaching cutter.

5. A machine for broaching notches in the sides of a plurality of rods relative "to notches in the end thereof including, in combination, a plurality of chambers for'receiving and clamping the rods,

positioning means for engaging the notches for rotating said rods during the clamping operation, a broaching cutter for machining a notch in the sides of said rods, an adjustable rest for positioning an end of the rods, and means for selectively positioning the rest to close and. open one end of the chambers, actuated by the movement of said breach.

6. A machine for broaching a notch in the end of a rod and an additional notch in the side thereof relative to the first said notch including two heads having chambers for receiving and clamping a rod, two breaches simultaneously reciprocabieinopposite directions through the actuation of a single control means, an adjustable rest associated with the end of each chamber for positioning an end of the rods, meansactuated'in accordance with the position of said broaches for selectively positioning said rests to close and open the end of said chambers, and common means for efiecting the clamping of one chamber and the unclamping of the other chamber simultaneously. r

7 'A machine for broaching a notch in the end of a rod and an adjustable notch in the side thereof relative to the first said notch including, in combination, two heads having chambersfor receiving and clamping a rod, two breaches simultaneously reciprocable in opposite'directions, an adjustable rest associated with the end of each chamber for positioning an end of the rods, means i of relative to'the first said notch including, in combination, two heads having a'plurality of chambers for receiving and clamping the rods, two

broaches simultaneously reciprocable in opposite directions for alternately machining the said rods, adjustable. rests associated with the bottom of the plurality of chambe'rs'for positioning the ends of the rods, and means actuated by the movement of the broaches for moving said rest to cover and uncover the bottom of the chambers in accordance to the position of the broaching cutters. Y

9. A broaching machines for cutting related notches in a plurality of members including, in combinatiomtwo rams, two bro'aches, one associated with each ram, means for. simultaneously reciprocating the rams and broaches in opposite directions, two heads each provided with a plurality of chambers in which work pieces are clampable, control means for clamping the work pieces in one head and unclamping the Work pieces in the other head when the latter work pieces have been machined, and means actuated by the movement of the broaches and rams for closing and opening the bottom of the chambers.

10. A breaching machine for cutting related notches in a plurality. of members including, in combination, two rams, two broaches, one associated with each ram, means for simultaneously reciprocating the rams and breaches in opposite directions, two heads each provided with a plurality of chambers in which work pieces are clampable, control means for clamping the work pieces in one head and unclamping the work' pieces in the other head when the latter, work' pieces have been machined, adjustable rests for closing the bottom of the chambers for retaining and positioning said work pieces, and means actuated by the movement of said rams and roaches for moving said rest from the bottom of said chambers after the work pieces have been machined.

WILLIAM A. HART. 

